Trying to get runfiles working

chrislovecnm · chrislovecnm · commit a9aec42c8699 · 2023-04-17T11:45:11.000-06:00
diff --git a/gazelle/manifest/generate/BUILD.bazel b/gazelle/manifest/generate/BUILD.bazel
@@ -6,7 +6,10 @@ go_library(
     srcs = ["generate.go"],
     importpath = "github.com/bazelbuild/rules_python/gazelle/manifest/generate",
     visibility = ["//visibility:public"],
-    deps = ["//manifest"],
+    deps = [
+        "//manifest",
+        "@io_bazel_rules_go//go/runfiles",
+    ],
 )
 
 sources_hash(
diff --git a/gazelle/manifest/generate/generate.go b/gazelle/manifest/generate/generate.go
@@ -28,6 +28,7 @@ import (
 	"os"
 	"strings"
 
+	"github.com/bazelbuild/rules_go/go/runfiles"
 	"github.com/bazelbuild/rules_python/gazelle/manifest"
 )
 
@@ -128,7 +129,24 @@ func main() {
 
 // unmarshalJSON returns the parsed mapping from the given JSON file path.
 func unmarshalJSON(jsonPath string) (map[string]string, error) {
-	file, err := os.Open(jsonPath)
+
+	r, err := runfiles.New()
+	if err != nil {
+		log.Fatalf("runfiles.New: %v", err)
+	}
+
+	// FIXME harding coding this for debugging
+	path := "modules_mapping.json"
+	path, err = r.Rlocation(path)
+	if err != nil {
+		log.Fatalf("runfiles.Path: %v", err)
+	}
+
+	file, err := r.Open(path)
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	if err != nil {
 		return nil, fmt.Errorf("failed to unmarshal JSON file: %w", err)
 	}
